![Lub ntsiab pacemaker ntawm lub plawv yog dab tsi? Lub ntsiab pacemaker ntawm lub plawv yog dab tsi?](https://i.answers-medical.com/preview/medical-health/14033988-what-is-the-main-pacemaker-of-the-heart-j.webp)
Video: Lub ntsiab pacemaker ntawm lub plawv yog dab tsi?
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2024 Tus sau: Michael Samuels | [email protected]. Kawg hloov kho: 2023-12-16 01:44
Cov plawv ua tau muaj ob lub ntuj cov pacemakers . Sinoatrial node (SA node) yog tus thawj pacemaker thiab atrioventricular node (AV node) yog qib thib ob. AV node yog nyob rau hauv ib pob ntawm cov ntaub so ntswg ntawm ciam teb uas cais txoj cai atrium thiab txoj cai ventricle.
Ib yam li ntawd, koj yuav nug, dab tsi yog lub tshuab ua kom lub plawv zoo li qub?
Hluav taws xob impulses los ntawm lub plawv cov leeg ua rau koj lub plawv dhia (kev cog lus). Cov teeb liab hluav taws xob no pib hauv lub sinoatrial (SA) ntawm, nyob rau sab saum toj ntawm lub plawv sab sauv sab xis (qhov txoj cai atrium ). Cov SA node qee zaum hu ua lub plawv "natural pacemaker."
Qhov thib ob, lub plawv ntuj pacemaker ua haujlwm li cas? Cov lub plawv ntuj pacemaker - SA node - xa tawm cov hluav taws xob tsis tu ncua los ntawm lub tsev sab saum toj (lub atrium) ua rau nws cog lus thiab tso ntshav mus rau hauv qab chav (lub ventricle). Cov plawv muaj plaub chav - ob sab saum toj (lub atria) thiab ob sab hauv qab (lub ventricles).
Ntawm no, cov leeg twg hu ua tus ua kom lub plawv dhia Vim li cas?
Lub SA (sinoatrial) node yog hu ua pacemaker vim hais tias nws muaj ib pab pawg ntawm cov hlwb nyob rau hauv lub phab ntsa ntawm txoj cai atrium uas muaj peev xwm mus spontaneously pib cov hluav taws xob impulse uas ua rau lub contraction ntawm lub plawv.
Puas yog AV node lub pacemaker ntawm lub plawv?
Cov cell no tsim Atrioventricular ntawm (los yog AV node ), uas yog thaj tsam ntawm sab laug atrium thiab sab xis ventricle nyob rau hauv lub atrial septum, yuav siv sij hawm tshaj qhov pacemaker lub luag haujlwm Cov cell AV node Feem ntau tso tawm ntawm li 40-60 neeg ntaus ib feeb, thiab hu ua theem nrab pacemaker.
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